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ISAACRandom (Commons Math 3.2 API)
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org.apache.commons.math3.random</FONT>
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Class ISAACRandom</H2>
<PRE>
<A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A>
  <IMG SRC="../../../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html" title="class in org.apache.commons.math3.random">org.apache.commons.math3.random.BitsStreamGenerator</A>
      <IMG SRC="../../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.commons.math3.random.ISAACRandom</B>
</PRE>
<DL>
<DT><B>All Implemented Interfaces:</B> <DD><A HREF="http://download.oracle.com/javase/6/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</A>, <A HREF="../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random">RandomGenerator</A></DD>
</DL>
<HR>
<DL>
<DT><PRE>public class <B>ISAACRandom</B><DT>extends <A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html" title="class in org.apache.commons.math3.random">BitsStreamGenerator</A><DT>implements <A HREF="http://download.oracle.com/javase/6/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</A></DL>
</PRE>

<P>
<a href="http://burtleburtle.net/bob/rand/isaacafa.html">
  ISAAC: a fast cryptographic pseudo-random number generator</a>
 <br/>
 ISAAC (Indirection, Shift, Accumulate, Add, and Count) generates 32-bit
 random numbers.
 ISAAC has been designed to be cryptographically secure and is inspired
 by RC4.
 Cycles are guaranteed to be at least 2<sup>40</sup> values long, and they
 are 2<sup>8295</sup> values long on average.
 The results are uniformly distributed, unbiased, and unpredictable unless
 you know the seed.
 <br/>
 This code is based (with minor changes and improvements) on the original
 implementation of the algorithm by Bob Jenkins.
 <br/>
<P>

<P>
<DL>
<DT><B>Since:</B></DT>
  <DD>3.0</DD>
<DT><B>Version:</B></DT>
  <DD>$Id: ISAACRandom.java 1416643 2012-12-03 19:37:14Z tn $</DD>
<DT><B>See Also:</B><DD><A HREF="../../../../../serialized-form.html#org.apache.commons.math3.random.ISAACRandom">Serialized Form</A></DL>
<HR>

<P>

<!-- ======== CONSTRUCTOR SUMMARY ======== -->

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<TD><CODE><B><A HREF="../../../../../org/apache/commons/math3/random/ISAACRandom.html#ISAACRandom()">ISAACRandom</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Creates a new ISAAC random number generator.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../../../org/apache/commons/math3/random/ISAACRandom.html#ISAACRandom(int[])">ISAACRandom</A></B>(int[]&nbsp;seed)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Creates a new ISAAC random number generator using an int array seed.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../../../org/apache/commons/math3/random/ISAACRandom.html#ISAACRandom(long)">ISAACRandom</A></B>(long&nbsp;seed)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Creates a new ISAAC random number generator using a single long seed.</TD>
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<CODE>protected &nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/commons/math3/random/ISAACRandom.html#next(int)">next</A></B>(int&nbsp;bits)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Generate next pseudorandom number.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/commons/math3/random/ISAACRandom.html#setSeed(int)">setSeed</A></B>(int&nbsp;seed)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sets the seed of the underlying random number generator using an
 <code>int</code> seed.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/commons/math3/random/ISAACRandom.html#setSeed(int[])">setSeed</A></B>(int[]&nbsp;seed)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sets the seed of the underlying random number generator using an
 <code>int</code> array seed.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/commons/math3/random/ISAACRandom.html#setSeed(long)">setSeed</A></B>(long&nbsp;seed)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sets the seed of the underlying random number generator using a
 <code>long</code> seed.</TD>
</TR>
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<TH ALIGN="left"><B>Methods inherited from class org.apache.commons.math3.random.<A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html" title="class in org.apache.commons.math3.random">BitsStreamGenerator</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#clear()">clear</A>, <A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextBoolean()">nextBoolean</A>, <A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextBytes(byte[])">nextBytes</A>, <A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextDouble()">nextDouble</A>, <A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextFloat()">nextFloat</A>, <A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextGaussian()">nextGaussian</A>, <A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextInt()">nextInt</A>, <A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextInt(int)">nextInt</A>, <A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextLong()">nextLong</A>, <A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextLong(long)">nextLong</A></CODE></TD>
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<!-- ========= CONSTRUCTOR DETAIL ======== -->

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<A NAME="ISAACRandom()"><!-- --></A><H3>
ISAACRandom</H3>
<PRE>
public <B>ISAACRandom</B>()</PRE>
<DL>
<DD>Creates a new ISAAC random number generator.
 <br/>
 The instance is initialized using a combination of the
 current time and system hash code of the instance as the seed.
<P>
</DL>
<HR>

<A NAME="ISAACRandom(long)"><!-- --></A><H3>
ISAACRandom</H3>
<PRE>
public <B>ISAACRandom</B>(long&nbsp;seed)</PRE>
<DL>
<DD>Creates a new ISAAC random number generator using a single long seed.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>seed</CODE> - Initial seed.</DL>
</DL>
<HR>

<A NAME="ISAACRandom(int[])"><!-- --></A><H3>
ISAACRandom</H3>
<PRE>
public <B>ISAACRandom</B>(int[]&nbsp;seed)</PRE>
<DL>
<DD>Creates a new ISAAC random number generator using an int array seed.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>seed</CODE> - Initial seed. If <code>null</code>, the seed will be related
 to the current time.</DL>
</DL>

<!-- ============ METHOD DETAIL ========== -->

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<A NAME="setSeed(int)"><!-- --></A><H3>
setSeed</H3>
<PRE>
public void <B>setSeed</B>(int&nbsp;seed)</PRE>
<DL>
<DD>Sets the seed of the underlying random number generator using an
 <code>int</code> seed.
 <p>Sequences of values generated starting with the same seeds
 should be identical.
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/commons/math3/random/RandomGenerator.html#setSeed(int)">setSeed</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random">RandomGenerator</A></CODE><DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#setSeed(int)">setSeed</A></CODE> in class <CODE><A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html" title="class in org.apache.commons.math3.random">BitsStreamGenerator</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>seed</CODE> - the seed value</DL>
</DD>
</DL>
<HR>

<A NAME="setSeed(long)"><!-- --></A><H3>
setSeed</H3>
<PRE>
public void <B>setSeed</B>(long&nbsp;seed)</PRE>
<DL>
<DD>Sets the seed of the underlying random number generator using a
 <code>long</code> seed.
 <p>Sequences of values generated starting with the same seeds
 should be identical.
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/commons/math3/random/RandomGenerator.html#setSeed(long)">setSeed</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random">RandomGenerator</A></CODE><DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#setSeed(long)">setSeed</A></CODE> in class <CODE><A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html" title="class in org.apache.commons.math3.random">BitsStreamGenerator</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>seed</CODE> - the seed value</DL>
</DD>
</DL>
<HR>

<A NAME="setSeed(int[])"><!-- --></A><H3>
setSeed</H3>
<PRE>
public void <B>setSeed</B>(int[]&nbsp;seed)</PRE>
<DL>
<DD>Sets the seed of the underlying random number generator using an
 <code>int</code> array seed.
 <p>Sequences of values generated starting with the same seeds
 should be identical.
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/commons/math3/random/RandomGenerator.html#setSeed(int[])">setSeed</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random">RandomGenerator</A></CODE><DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#setSeed(int[])">setSeed</A></CODE> in class <CODE><A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html" title="class in org.apache.commons.math3.random">BitsStreamGenerator</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>seed</CODE> - the seed value</DL>
</DD>
</DL>
<HR>

<A NAME="next(int)"><!-- --></A><H3>
next</H3>
<PRE>
protected int <B>next</B>(int&nbsp;bits)</PRE>
<DL>
<DD>Generate next pseudorandom number.
 <p>This method is the core generation algorithm. It is used by all the
 public generation methods for the various primitive types <A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextBoolean()"><CODE>BitsStreamGenerator.nextBoolean()</CODE></A>, <A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextBytes(byte[])"><CODE>BitsStreamGenerator.nextBytes(byte[])</CODE></A>, <A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextDouble()"><CODE>BitsStreamGenerator.nextDouble()</CODE></A>,
 <A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextFloat()"><CODE>BitsStreamGenerator.nextFloat()</CODE></A>, <A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextGaussian()"><CODE>BitsStreamGenerator.nextGaussian()</CODE></A>, <A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextInt()"><CODE>BitsStreamGenerator.nextInt()</CODE></A>,
 <A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#next(int)"><CODE>BitsStreamGenerator.next(int)</CODE></A> and <A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#nextLong()"><CODE>BitsStreamGenerator.nextLong()</CODE></A>.</p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html#next(int)">next</A></CODE> in class <CODE><A HREF="../../../../../org/apache/commons/math3/random/BitsStreamGenerator.html" title="class in org.apache.commons.math3.random">BitsStreamGenerator</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>bits</CODE> - number of random bits to produce
<DT><B>Returns:</B><DD>random bits generated</DL>
</DD>
</DL>
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